-{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE RankNTypes #-}
module Language.Haskell.LSP.Test.Parsing where
+import Control.Applicative
+import Control.Concurrent.Chan
+import Control.Concurrent.MVar
+import Control.Monad.Trans.Class
+import Control.Monad.IO.Class
+import Control.Monad.Trans.Reader
+import Control.Monad.Trans.State
+import Data.Aeson
import qualified Data.ByteString.Lazy.Char8 as B
+import Data.Conduit hiding (await)
+import Data.Conduit.Parser
+import Data.Maybe
+import Language.Haskell.LSP.Messages
+import Language.Haskell.LSP.Types
+import Language.Haskell.LSP.Test.Compat
+import Language.Haskell.LSP.Test.Decoding
+import Language.Haskell.LSP.Test.Messages
import System.IO
-getAllMessages :: Handle -> IO [B.ByteString]
-getAllMessages h = do
- done <- hIsEOF h
- if done
- then return []
- else do
- msg <- getNextMessage h
-
- (msg :) <$> getAllMessages h
-
--- | Fetches the next message bytes based on
--- the Content-Length header
-getNextMessage :: Handle -> IO B.ByteString
-getNextMessage h = do
- headers <- getHeaders h
- case read . init <$> lookup "Content-Length" headers of
- Nothing -> error "Couldn't read Content-Length header"
- Just size -> B.hGet h size
-
-addHeader :: B.ByteString -> B.ByteString
-addHeader content = B.concat
- [ "Content-Length: "
- , B.pack $ show $ B.length content
- , "\r\n"
- , "\r\n"
- , content
- ]
-
-getHeaders :: Handle -> IO [(String, String)]
-getHeaders h = do
- l <- hGetLine h
- let (name, val) = span (/= ':') l
- if null val then return [] else ((name, drop 2 val) :) <$> getHeaders h
+data SessionContext = SessionContext
+ {
+ serverIn :: Handle,
+ rootDir :: FilePath,
+ messageChan :: Chan FromServerMessage,
+ requestMap :: MVar RequestMap
+ }
+
+newtype SessionState = SessionState
+ {
+ curReqId :: LspId
+ }
+
+type ParserStateReader a s r m = ConduitParser a (StateT s (ReaderT r m))
+
+-- | A session representing one instance of launching and connecting to a server.
+--
+-- You can send and receive messages to the server within 'Session' via 'getMessage',
+-- 'sendRequest' and 'sendNotification'.
+--
+-- @
+-- runSession \"path\/to\/root\/dir\" $ do
+-- docItem <- getDocItem "Desktop/simple.hs" "haskell"
+-- sendNotification TextDocumentDidOpen (DidOpenTextDocumentParams docItem)
+-- diagnostics <- getMessage :: Session PublishDiagnosticsNotification
+-- @
+type Session = ParserStateReader FromServerMessage SessionState SessionContext IO
+
+-- | Matches if the message is a notification.
+anyNotification :: Monad m => ConduitParser FromServerMessage m FromServerMessage
+anyNotification = satisfy isServerNotification
+
+notification :: forall m a. (Monad m, FromJSON a) => ConduitParser FromServerMessage m (NotificationMessage ServerMethod a)
+notification = do
+ let parser = decode . encodeMsg :: FromServerMessage -> Maybe (NotificationMessage ServerMethod a)
+ x <- satisfy (isJust . parser)
+ return $ fromJust $ decode $ encodeMsg x
+
+-- | Matches if the message is a request.
+anyRequest :: Monad m => ConduitParser FromServerMessage m FromServerMessage
+anyRequest = satisfy isServerRequest
+
+request :: forall m a b. (Monad m, FromJSON a, FromJSON b) => ConduitParser FromServerMessage m (RequestMessage ServerMethod a b)
+request = do
+ let parser = decode . encodeMsg :: FromServerMessage -> Maybe (RequestMessage ServerMethod a b)
+ x <- satisfy (isJust . parser)
+ return $ fromJust $ decode $ encodeMsg x
+
+-- | Matches if the message is a response.
+anyResponse :: Monad m => ConduitParser FromServerMessage m FromServerMessage
+anyResponse = satisfy isServerResponse
+
+response :: forall m a. (Monad m, FromJSON a) => ConduitParser FromServerMessage m (ResponseMessage a)
+response = do
+ let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
+ x <- satisfy (isJust . parser)
+ return $ fromJust $ decode $ encodeMsg x
+
+-- | A version of encode that encodes FromServerMessages as if they
+-- weren't wrapped.
+encodeMsg :: FromServerMessage -> B.ByteString
+encodeMsg = encode . genericToJSON (defaultOptions { sumEncoding = UntaggedValue })
+
+-- | Matches if the message is a log message notification or a show message notification/request.
+loggingNotification :: Monad m => ConduitParser FromServerMessage m FromServerMessage
+loggingNotification = satisfy shouldSkip
+ where
+ shouldSkip (NotLogMessage _) = True
+ shouldSkip (NotShowMessage _) = True
+ shouldSkip (ReqShowMessage _) = True
+ shouldSkip _ = False
+
+publishDiagnosticsNotification :: Monad m => ConduitParser FromServerMessage m PublishDiagnosticsNotification
+publishDiagnosticsNotification = do
+ NotPublishDiagnostics diags <- satisfy test
+ return diags
+ where test (NotPublishDiagnostics _) = True
+ test _ = False
+
+satisfy :: Monad m => (a -> Bool) -> ConduitParser a m a
+satisfy pred = do
+ x <- await
+ if pred x
+ then return x
+ else empty
+
+runSession' :: Chan FromServerMessage -> SessionContext -> SessionState -> Session a -> IO (a, SessionState)
+runSession' chan context state session = runReaderT (runStateT conduit state) context
+ where conduit = runConduit $ chanSource chan .| runConduitParser session
+
+get :: Monad m => ParserStateReader a s r m s
+get = lift Control.Monad.Trans.State.get
+
+put :: Monad m => s -> ParserStateReader a s r m ()
+put = lift . Control.Monad.Trans.State.put
+
+modify :: Monad m => (s -> s) -> ParserStateReader a s r m ()
+modify = lift . Control.Monad.Trans.State.modify
+
+ask :: Monad m => ParserStateReader a s r m r
+ask = lift $ lift Control.Monad.Trans.Reader.ask
projects / lsp-test.git / blobdiff